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CVE-2026-69237

HTML injection vulnerability in Esri Portal for ArcGIS

MEDIUM

4.8

CVSS Score

Published: August 21, 2026 at 08:53 PM UTC

Updated: October 12, 2026 at 04:10 PM UTC

1 product affected across 1 vendorPortal for ArcGIS

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Severity

MEDIUM4.8

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

There is an HTML injection vulnerability in Esri Portal for ArcGIS versions 11.3 and prior that allows a remote attacker with administrative privileges to insert arbitrary HTML into an administrative API. Users working with ArcGIS Enterprise 11.1, and 11.3 are encouraged to patch. All users are advised to upgrade to the latest long-term support release.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Portal for ArcGIS · Esri

95%

v < 11.111.1 11.1 security_2024_update1 11.1 security_2024_update2 11.1 security_2025_update1 11.1 security_2025_update2 11.1 security_2025_update3 11.1 security_2026_update2 11.2 11.3 11.3 security_2025_update1 11.3 security_2025_update2 11.3 security_2025_update3 11.3 security_2026_update2

Affected range stops below 11.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/august-2026-arcgis-security-bulletin

References (1)

Vendor Advisory

Source: cverecord

https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/august-2026-arcgis-security-bulletin

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: HIGH
User Interaction: REQUIRED
Scope: CHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-79

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